var Class = require('../utils/Class'); 
var Euler = require('../math/Euler'); 
var Matrix4 = require('../math/Matrix4'); 
var Quaternion = require('../math/Quaternion'); 
var Vector3 = require('../math/Vector3'); 
var id = 0; 
var tempMatrix = new Matrix4(); 
var GameObject3D = new Class({ 
initialize: function GameObject3D(){ 
this.id = id++ ; 
this.name = ''; 
this.type = ''; 
this.position = new Vector3(); 
this.scale = new Vector3(1, 1, 1); 
this.euler = new Euler(); 
this.quaternion = new Quaternion(); 
this.matrix = new Matrix4(); 
this.worldMatrix = new Matrix4(); 
this.children = [] ; 
this.parent = null ; 
this.castShadow = false ; 
this.receiveShadow = false ; 
this.shadowType = 0; 
this.frustumCulled = true ; 
this.visible = true ; 
this.renderOrder = 0; 
this.matrixAutoupdate = true ; 
this.matrixNeedsUpdate = true ; 
this.worldMatrixNeedsUpdate = true ; 
var euler = this.euler; 
var quat = this.quaternion; 
euler.onChangeCallback = function (){ 
quat.setFromEuler(euler, false ); 
} 
; 
quat.onChangeCallback = function (){ 
euler.setFromQuaternion(quat); 
} 
; 
} 
,
add: function (child){ 
if (child !== this) { 
if (child.parent !== null ) { 
child.parent.remove(child); 
} 
child.parent = this; 
this.children.push(child); 
child.worldMatrixNeedsUpdate = true ; 
} 
return this; 
} 
,
remove: function (child){ 
var index = this.children.indexOf(child); 
if (index > -1) { 
child.parent = null ; 
this.children.splice(index, 1); 
child.worldMatrixNeedsUpdate = true ; 
} 
return this; 
} 
,
updateMatrix: function (force){ 
if (this.matrixAutoupdate || this.matrixNeedsUpdate) { 
this.matrix.transform(this.position, this.scale, this.quaternion); 
this.matrixNeedsUpdate = false ; 
this.worldMatrixNeedsUpdate = true ; 
} 
if (this.worldMatrixNeedsUpdate || force) { 
this.worldMatrix.copy(this.matrix); 
if (this.parent) { 
var parentMatrix = this.parent.worldMatrix; 
this.worldMatrix.premultiply(parentMatrix); 
} 
this.worldMatrixNeedsUpdate = false ; 
force = true ; 
} 
var children = this.children; 
for (var i = 0; 
i < (_AN_Read_length('length', children)); i++ ){ 
children[i].updateMatrix(force); 
} 
} 
,
getWorldDirection: function (target){ 
if (target === undefined) { 
target = new Vector3(); 
} 
var world = this.worldMatrix.val; 
return target.set(world[8], world[9], world[10]).normalize(); 
} 
,
lookAt: function (target, up){ 
tempMatrix.lookAtRH(target, this.position, up); 
this.quaternion.setFromRotationMatrix(tempMatrix); 
} 
,
destroy: function (){ 
} 
}
); 
module.exports = GameObject3D;